EntityQ690935· pop 32· linked from 154 articlessaddle pointSign in to savestationary point that is not a local extremumConnectionsmaxima and minimaEntityhyperboloidEntityparaboloidEntitystable manifoldEntitymathematicsEntityInternational Standard Book NumberEntityDavid HilbertEntitypointEntitydimensionEntitysaddleEntitycurveEntityslopeEntityEuclidean spaceEntityunit circleEntitygraph of a functionEntitycontour lineEntityeigenvectors and eigenvaluesEntitydynamical systemEntityNash equilibriumEntityhyperbolic geometryEntityCategoriesAnalytic geometryDifferential geometry of surfacesMultivariable calculusStability theory